I took forever to start writing my personal statement and just started last Sunday....I was in the same boat..and now i'm very happy with it after working on it for hours. This is my advice..
1. First off all, ASK YOURSELF what makes you DIFFERENT from everyone else (life experiences, extracurricular activities, sports, family, culture, etc.) If you still think nothing makes you different, then ask your mom, dad, or cousin, etc.

about something unique related to who you are...
😉
2. Think about an experience in your life related to that and begin from there. Make the introduction interesting..by asking a question, or something that would stand out in the very first line of your statement..it could be dramatic..it doesn't matter...If you don't have any creativity...put all your effort in that first sentence of your statement.
3. Tell a STORY.. it's a good way to keep the reader interested, and put some biographical information and everything else you would like to say or explain (dental experience, activities, academics, etc)...
4. End summarizing what you have stated and why dentistry meets your personal and professional goals.
and ... Keep it simple...
Make some people look at it and give you some feedback too, which is essential. Hope this help kind of...Good Luck